public class MobileTelephone {

   SIM card;

   public void useSIM(SIM card) {

      this.card=card;

   }

   public void showMess() {

      System.out.println("使用的卡是:"+card.giveCorpName()+"提供的");

      System.out.println("手机号码是:"+card.giveNumber());

   }

}
